Eh, I'm not sure how a silver blade would look different from a white. It's like trying to describe what a "black" saber would be.

Obviously a Black saber would be the one with the afro and the blings.

As for Silver/White saber, it should be noted that colored sabers would quite often have its core tainted to the outter color of the saber, for obvious reasons, you are seeing the bright white saber thru a layer of colored light.

So silver would have a white core with a slightly greyish side, instead of being tainted with blue/yellow/etc as some white saber arts would have done.